niceeshop(TM) Black 1 Female 2.1mm Jack to 2 Male 2.1mm Plug Power Supply Splitter Cable DC Power Y Adapter for CCTV Brand new product with high quality; Length:25cm/9.8inches Out-side diameter 5.5mm,In-side diameter 2.1mm Can be used power two devices from 1 power supply Standard DC jack for DC power needed applications such as CCTV